Holt JStrawn KEstuaries2010-02-152010-02-151983http://hdl.handle.net/1969.3/2311066-75Macrozooplankton were sampled bi-weekly from October 1969 through May 1973 at 16 stations. Hydrological measurements, including water temperature and conductivity, accompanied each biological sample. Sampling sites and species were grouped by cluster analysis using Camberra-Metric measure of dissimilarity and flexible sorting. Two major seasons, based on taxon composition and abundance, were identified: A warm season (average water temperature above 22 degree C) dominated by larval and juvenile crustaceans, and a cool season with an abundance of larval fishes. Sites were more similar to each other within a year than they were between years. Differences between years correlated with variations in salinity and temperature. Community structure indices (Shannon-Weaver diversity, species richness and 'evenness') were applied to the seasonal data. Shannon diversity and 'evenness' were positively correlated with each other, but richness values were often negatively correlated with the other two indicesabundanceanalysisASW,USA,Texas,Galveston BayASW,USA,Texas,Trinity BayBaysbiologicalcommunity structureCrustaceansD 04210 Coastal ecosystemsecological diversityGalveston BaymeasurementO 1070 BIOLOGICAL OCEANOGRAPHY/ ECOLOGYQ1 01461 PlanktonSalinitySamplingseasonal variationsspecies compositionTemperatureTexasUSAUSA,Galveston BayUSA,Texas,Trinity Baywaterwater temperatureZooplanktonJournal